Boring-tool.



I PATE'NTBD MAY 26, 1903. 1 E. W. WILLIAMS & J. H. L, TREVORROW.

BORING TOOL. APPLICATION FILED NOV. 1, 1902.

2 shims-SHEET 1..

N0 MODEL.

f my No. 729,469. PATE-NTED MAY 26, 1903.

E. W. WILLIAMS & J. H. L. TREVORROW.

v BORING TOOL. APPLIOATION FILED NOV. I 1902.

2 SHEETS-SHEET 2Q N0 MODEL.

No."z2e,4c9. Patented May 26, 1903.

UN TED STATES PATENT OFFICE.

EDGAR WILLIAM WILLIAMS AND JOSEPH HICKSLANGFORD TREVORROW,

' OF NEWPORT, ENGLAND.

BORING-TOOL.

SPECIFIC ATION forming par of Letters Patent No. 729,469, dated May '26, 1903.

Application filed November 1, 1902- Serial No. 129,733. (No model.)

To all whom it may on n: view, the boring-bar not being shown in 5 Be it known that we, EDGAR WILLIAM WIL Fig. 5.

LIAMS and JOSEPH HICKS LANGFORD TRE- The same letters of referencedenote the VORROW, subjects of the King of England, same parts in all the views.

5 residing at 77 Gaerleon road, Newport, in the V a shows cylindrical body; I), toothed eccencountyof Monmouth, England, have invented trio within same; 0, worm engaging with said certain new and useful Improvements in Boreccentric b in order to turn same, and thus ing-Tools; and we do hereby declare the foladjust taper. lowing to be a full, clear, and exact descripi d is the boring-bar, attached eccentrically IO tion of the invention, such as will enable to the eccentric b. One end of the boringothers skilled in the art to which it apperbar d is carried on a center e, and the other tains to make and use the same. end is supported in and carried through the This invention relates to improved mechcylindrical body a. This boring-bar is supanism for converting ordinary or cylindrical ported in the cylindrical body a, and at the [5 holes into taper holes or for alteringthe ta: endfof the central leading-screw g a quadper of taper holes, the same mechanism also rant and change-wheels may be fitted for 6c furnishing an adjustable eccentric device apfeed motion, or hand or ordinary self-acting plicable to other purposes. V motion may be adopted. hshows worm-gear- The mechanism is especially adapted to be ing for working. The loose bracket 2', which 20 fixed to the coupling-flanges of any shafts carries the driving end, allows of the boring- (more especially tunnel-shafts in steamers) bar being placed in and taken out of posifor the purpose of boring out the taper bolttion for working. j shows the tool-holder, holes while the shafts are in position. Thusandlcthe cutters. The screw 9 passes through any desired taper may be made to suit any a block 1, secured in the eccentric b, as shown 25 bolts to be replaced. 7 in Fig. 1. r

The mechanism consists of a cylindrical Referring to Figs. 3, 4, and 5,it will be seen body with an internal eccentric, said eccenthat the Whole device is placed in position on tric being provided with teeth on its periphthe work andheld therein by a chain Z, wedges cry and adjusted by means of a worm on m, straining-screw n, and adjusting-pins 0.

o gaging in same, all inclosed in an eccentric The boring-bar is passed through the existopeningin above-mentioned cylindrical body. ing bolt-hole and the taper adjusted by means Attached eccentrically to the above-named of the eccentric mechanism. In these views, eccentric is a boring-bar, one end of same pp showlengths of shafting,andqqcouplingbeing carried on a center and the other supflanges.

3 5 ported in the said cylindrical body. Suitable What we claim, and desire to secure by Letdriving mechanism is provided. ters Patent of the United States of America,

In the accompanying drawings, Figure 1 is isa longitudinal section of our boring mechan- 1. A boring-tool consisting of a cylindrical ism, parts being shown in elevation; andFig. body having a circular opening eccentrically o 2 is a cross-section of the same. Figs. 3, 4, located therein,an eccentrically-mounted bor and5 show the general arrangement of the ing-bar in said opening,-and means for admechanism as in position for boring bolt-holes justing said barin said opening, substantially in two abutting shaft-flanges, Fig. 3 being a as described. side View, Fig. 4 a plan, and Fig. 5 an end 2. A boring-tool consisting of acylindrical body having an eccentric opening therein, a toothed eccentric mounted therein,a boringbar carried by said eccentric, and worm-gearing engaging with the teeth on said eccentric, substantially as described.

3. The combination with a boring-tool consisting of a cylindrical body having a circular opening eccentrically located therein, an eccentric mounted in said opening, a boring- IO bar carried by said eccentric, and means for adjusting said eccentric in said opening, of means for driving said boring-tool and feeding it forward, substantially as described.

In testimony whereof we aflix our signatures in presence of two witnesses.

EDGAR WILLIAM WILLIAMS. JOSEPH HICKS LANGFORD TREVORROW. Witnesses:

HENRY B. BIRCH, JNo. J. BURNELL. 

